Precautions when working with electrical equipment (Freelander 1)

General information

The following instructions ensure safe working conditions and the safety of the vehicle's electrical and electronic equipment. Additional instructions relating to individual types of work are provided in the relevant sections of the Manual.

Equipment

Before starting any diagnostic procedure, make sure that all equipment is working properly and that all cables and connectors are in good condition. Be sure to check the condition of the wires and terminals of the power supply circuit of the device.

Maintaining polarity

Connect the battery to the vehicle circuit correctly, and observe the correct polarity when connecting diagnostic equipment.

High voltage circuits

When disconnecting a high voltage circuit, always use pliers with insulated handles and never allow the open end of the circuit to come into contact with other components, especially electronic control units.

Be careful when measuring the voltage at the ignition coil terminals while the engine is running. A high voltage pulse may appear at these terminals.

Connectors and Wiring Harnesses

The engine compartment space is an environment that is particularly unfavorable for the placement of electrical system components and connectors:

Data taken from the website [www.lrman.ru]

• Before disconnecting or connecting diagnostic equipment, make sure that the surface of electrical system components is dry and free of oil leaks.
• The disconnected connectors must not have traces of oil, coolant or other liquids. Such damage may adversely affect the operation of the systems or cause a sudden failure.
• Never disassemble electrical connectors by applying significant mechanical force, such as using a screwdriver as a lever or pulling on a harness.
• Before disassembling the connector, return the connector lock to the disassembled position; before assembling the connector, make sure that the connector parts are in the correct relative position.
• All protective elements (covers, cases) must be replaced if damaged.

In order to make sure that any component is malfunctioning, follow the following sequence of actions:

• Turn off the ignition and disconnect the battery.
• Remove the component. Secure the disconnected wiring harness in a hanging position.
• When replacing a component, do not allow oily hands to touch electrical connectors; insert the connector into the mating part until the latch snaps into place completely.